What's special about the Event Horizon Telescope that imaged the M87* black hole?

Why wasn't it Hubble that imaged M87*, or Messier 87's supermassive black hole? Is the Event Horizon Telescope more powerful?
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Image Credits: NASA/ESO/ESA/EHT

Music Credits:
Stellardrone - Crepuscular Rays

Видео What's special about the Event Horizon Telescope that imaged the M87* black hole? канала Astrum